Add function to check GMM encryptability
Check if particular GMM message can be encrypted according to 3GPP TS
24.008 ยง 4.7.1.2
Related: OS#1582
Change-Id: I7ad0e03c2c738d174dd6bc3453f332eeb8da1e7d
diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h b/include/osmocom/gsm/protocol/gsm_04_08.h
index 074c258..e442c7f 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -6,7 +6,6 @@
#include <osmocom/core/utils.h>
#include <osmocom/core/endian.h>
-
/* GSM TS 04.08 definitions */
struct gsm_lchan;
@@ -925,6 +924,8 @@
#define GSM48_PDISC_MASK 0x0f
#define GSM48_PDISC_USSD 0x11
+bool gsm48_hdr_gmm_cipherable(const struct gsm48_hdr *hdr);
+
static inline uint8_t gsm48_hdr_pdisc(const struct gsm48_hdr *hdr)
{
/*